import random
import time
from datetime import timedelta, datetime

from flask import render_template, request, current_app, session, url_for, g, redirect, jsonify, abort, flash

from info import constants, db
from info.models import User, News, Category
from info.modules.admin import admin_blu
from info.utils.common import user_login_data
from info.utils.image_storage import storage
from info.utils.response_code import RET


@admin_blu.route('/delete_type')
def delete_type():
    # 1. 取参数
    cid = request.args.get("cid")
    cid = int(cid)

    if cid:
        if cid in [1, 2, 3, 4, 5, 6]:

            # return jsonify(errno=RET.DATAERR, errmsg="无法删除默认分类")

            # 在重定向之前给出一段提示
            # 方法1:直接弹窗提示,之后没法重定向
            # return "<script>alert('无法删除默认分类')</script>"

            # 方法2:flash前端提示,再重定向
            flash("!!无法删除默认分类")
            return redirect(url_for('admin.news_type'))
        else:
            try:
                category = Category.query.get(cid)
            except Exception as e:
                current_app.logger.error(e)
                return jsonify(errno=RET.PARAMERR, errmsg=u"查询数据失败")

            if not category:
                return jsonify(errno=RET.NODATA, errmsg="未查询到分类数据")

            # 删除新分类新闻如何处理?将待删除的分类新闻随机划分到默认分类2~6下
            news_list = News.query.filter(News.category_id == cid).all()
            try:
                for new in news_list:
                    new.category_id = random.randint(2, 6)
                    db.session.commit()  # 如不手动提交会news.category_id是null

                db.session.delete(category)
            except Exception as e:
                current_app.logger.error(e)  # 日志先记录错误e,再执行撤回数据库操作
                db.session.rollback()
                return jsonify(errno=RET.DBERR, errmsg="数据库操作失败")

            return redirect(url_for('admin.news_type'))
    else:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")


@admin_blu.route('/news_type', methods=["GET", "POST"])
def news_type():
    if request.method == "GET":
        try:
            categories = Category.query.all()
        except Exception as e:
            current_app.logger.error(e)
            return render_template('admin/news_type.html', errmsg="查询数据错误")

        category_dict_li = []
        for category in categories:
            # 取到分类的字典
            cate_dict = category.to_dict()
            category_dict_li.append(cate_dict)

        # 移除最新的分类
        category_dict_li.pop(0)

        data = {
            "categories": category_dict_li
        }

        return render_template('admin/news_type.html', data=data)

    # 新增或者添加分类
    # 1. 取参数
    cname = request.json.get("name")
    # 如果传了cid，代表是编辑已存在的分类
    cid = request.json.get("id")

    if not cname:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if cid:
        # 有分类id代表修改分类名
        try:
            cid = int(cid)
            category = Category.query.get(cid)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="查询数据失败")

        if not category:
            return jsonify(errno=RET.NODATA, errmsg="未查询到分类数据")
        category.name = cname
    else:
        # 代表新增分类
        category = Category()
        category.name = cname
        db.session.add(category)

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")

    return jsonify(errno=RET.OK, errmsg="保存数据成功")


@admin_blu.route('/news_edit_detail', methods=["GET", "POST"])
def news_edit_detail():
    """新闻编辑详情"""
    if request.method == "GET":
        news_id = request.args.get("news_id")

        if not news_id:
            abort(404)

        try:
            news_id = int(news_id)
        except Exception as e:
            current_app.logger.error(e)
            return render_template('admin/news_edit_detail.html', errmsg="参数错误")

        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_edit_detail.html', errmsg="未查询到数据")

        # 查询分类数据
        categories = Category.query.all()
        category_dict_li = []
        for category in categories:
            # 取到分类的字典
            cate_dict = category.to_dict()
            cate_dict["is_selected"] = False
            # 判断当前遍历到的分类是否是当前新闻的分类，如果是，则添加is_selected为true
            if category.id == news.category_id:
                cate_dict["is_selected"] = True
            category_dict_li.append(cate_dict)

        # 移除最新的分类
        category_dict_li.pop(0)

        data = {
            "news": news.to_dict(),
            "categories": category_dict_li
        }

        return render_template('admin/news_edit_detail.html', data=data)

    # 取到Post进来的数据
    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")
    # 1.1 判断数据是否有值
    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    # 查询指定id的新闻
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询失败")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 1.2 尝试读取图片
    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

        # 2. 将标题图片上传到七牛
        try:
            key = storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg="上传图片错误")
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key

    # 3. 设置相关数据
    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    # 4. 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")

    return jsonify(errno=RET.OK, errmsg="编辑成功")


@admin_blu.route('/news_edit')
def news_edit():
    """新闻编辑"""
    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", None)
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    filters = [News.status == 0]
    # 如果关键字存在，那么就添加关键字搜索
    if keywords:
        filters.append(News.title.contains(keywords))
    try:
        paginate = News.query.filter(*filters) \
            .order_by(News.update_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        # 添加上待审核的新闻作者
        news_dict = news.to_basic_dict()
        news_user = None
        id = None
        try:
            id = news.user_id
            if id:
                news_user = User.query.get(id)
                news_dict["nick_name"] = news_user.nick_name
            else:
                news_dict["nick_name"] = "无来源"
        except Exception as e:
            current_app.logger.error(e)
        # 为news_dict字典赋予新值nick_name,供前端展示所用
        news_dict_list.append(news_dict)

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_edit.html', data=context)


@admin_blu.route('/news_review_action', methods=["POST"])
def news_review_action():
    # 1. 接受参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    # 2. 参数校验
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("accept", "reject"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询到指定的新闻数据
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询失败")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")

    if action == "accept":
        # 代表接受
        news.status = 0
    else:
        # 代表拒绝
        reason = request.json.get("reason")
        if not reason:
            return jsonify(errno=RET.PARAMERR, errmsg="请输入拒绝原因")
        news.status = -1
        news.reason = reason

    # 保存数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="数据保存失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")


@admin_blu.route('/news_review_detail/<int:news_id>')
def news_review_detail(news_id):
    if not news_id:
        return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

    # 通过id查询新闻
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

    # 返回数据
    data = {"news": news.to_dict()}
    return render_template('admin/news_review_detail.html', data=data)


@admin_blu.route('/news_review')
def news_review():
    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", None)

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    filters = [News.status != 0]
    # 如果关键字存在，那么就添加关键字搜索
    if keywords:
        filters.append(News.title.contains(keywords))
    try:
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict = news.to_review_dict()

        # 添加上待审核的新闻作者
        id = news.user_id
        news_user = None
        try:
            news_user = User.query.get(id)
        except Exception as e:
            current_app.logger.error(e)
        # 为news_dict字典赋予2个新值nick_name和user_id,供前端展示所用
        news_dict["nick_name"] = news_user.nick_name
        news_dict["user_id"] = id
        news_dict_list.append(news_dict)

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_review.html', data=context)


@admin_blu.route('/user_list')
def user_list():
    page = request.args.get("page", 1)

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    users = []
    current_page = 1
    total_page = 1

    try:
        paginate = User.query.filter(User.is_admin == False).paginate(page, constants.ADMIN_USER_PAGE_MAX_COUNT, False)
        users = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    # 进行模型列表转字典列表
    user_dict_li = []
    for user in users:
        user_dict_li.append(user.to_admin_dict())

    data = {
        "users": user_dict_li,
        "total_page": total_page,
        "current_page": current_page,
    }

    return render_template('admin/user_list.html', data=data)


@admin_blu.route('/user_count')
def user_count():
    # 总人数
    total_count = 0
    try:
        total_count = User.query.filter(User.is_admin == False).count()
    except Exception as e:
        current_app.logger.error(e)

    # 月新增数
    mon_count = 0
    t = time.localtime()  # t ==> time.struct_time(tm_year=2023, tm_mon=2, tm_mday=10, tm_hour=9, tm_min=36, tm_sec=39, tm_wday=4, tm_yday=41, tm_isdst=0)
    begin_mon_date_str = '%d-%02d-01' % (t.tm_year, t.tm_mon)  # '2023-02-01'
    # 将字符串转成datetime对象
    begin_mon_date = datetime.strptime(begin_mon_date_str, "%Y-%m-%d")  # datetime 2023-02-01 00:00:00
    try:
        mon_count = User.query.filter(User.is_admin == False, User.create_time >= begin_mon_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 日新增数
    day_count = 0
    begin_day_date = datetime.strptime(('%d-%02d-%02d' % (t.tm_year, t.tm_mon, t.tm_mday)),
                                       "%Y-%m-%d")  # datetime 2023-02-10 00:00:00
    try:
        day_count = User.query.filter(User.is_admin == False, User.create_time > begin_day_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 拆线图数据
    active_time = []
    active_count = []

    # 取到今天的时间字符串
    today_date_str = ('%d-%02d-%02d' % (t.tm_year, t.tm_mon, t.tm_mday))  # '2023-02-10'
    # 转成时间对象
    today_date = datetime.strptime(today_date_str, "%Y-%m-%d")  # datetime 2023-02-10 00:00:00

    for i in range(0, 31):
        # 取到某一天的0点0分 #  i=0
        begin_date = today_date - timedelta(days=i)  # 2023-02-10 00:00:00
        # 取到下一天的0点0分
        end_date = today_date - timedelta(days=(i - 1))  # 2023-02-11 00:00:00
        count = User.query.filter(User.is_admin == False, User.last_login >= begin_date,
                                  User.last_login < end_date).count()
        active_count.append(count)
        active_time.append(begin_date.strftime('%Y-%m-%d'))

    # User.query.filter(User.is_admin == False, User.last_login >= 今天0点0分, User.last_login < 今天24点).count()

    # 反转，让最近的一天显示在最后
    active_time.reverse()
    active_count.reverse()

    data = {
        "total_count": total_count,  # 10003
        "mon_count": mon_count,  # 0
        "day_count": day_count,  # 0
        "active_time": active_time,
        # ['2023-01-11', '2023-01-12', '2023-01-13', '2023-01-14', '2023-01-15', '2023-01-16', '2023-01-17', '2023-01-18', '2023-01-19', '2023-01-20', '2023-01-21', '2023-01-22', '2023-01-23', '2023-01-24', '2023-01-25', '2023-01-26', '2023-01-27', '2023-01-28', '2023-01-29', '2023-01-30', '2023-01-31', '2023-02-01', '2023-02-02', '2023-02-03', '2023-02-04', '2023-02-05', '2023-02-06', '2023-02-07', '2023-02-08', '2023-02-09', '2023-02-10']
        "active_count": active_count
        # [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0]
    }

    return render_template('admin/user_count.html', data=data)


@admin_blu.route('/index')
@user_login_data
def index():
    user = g.user
    return render_template('admin/index.html', user=user.to_dict())


@admin_blu.route('/login', methods=["GET", "POST"])
def login():
    if request.method == "GET":
        user_id = session.get("user_id", None)
        is_admin = session.get("is_admin", False)
        if user_id and is_admin:
            return redirect(url_for('admin.index'))

        return render_template('admin/login.html')

    # 取到登录的参数
    username = request.form.get("username")
    password = request.form.get("password")

    # 判断参数
    if not all([username, password]):
        return render_template('admin/login.html', errmsg="参数错误")

    # 查询当前用户
    try:
        user = User.query.filter(User.mobile == username, User.is_admin == True).first()
    except Exception as e:
        current_app.logger.error(e)
        return render_template('admin/login.html', errmsg="用户信息查询失败")

    if not user:
        return render_template('admin/login.html', errmsg="未查询到用户信息")

    # 校验密码
    if not user.check_password(password):
        return render_template('admin/login.html', errmsg="用户名或者密码错误")

    if not user.is_admin:
        return render_template('admin/login.html', errmsg="用户权限错误")

    # 保存用户的登录信息
    session["user_id"] = user.id
    session["mobile"] = user.mobile
    session["nick_name"] = user.nick_name
    session["is_admin"] = user.is_admin

    # 跳转到后台管理主页
    return redirect(url_for("admin.index"))


@admin_blu.route('/logout')
def logout():
    session.pop('user_id', None)
    session.pop('mobile', None)
    session.pop('nick_name', None)
    # 清除admin的值,如果不清除,会登录管理员,保存session,在登录普通用户,又能访问管理员页面
    session.pop('is_admin', None)

    return redirect(url_for("admin.login"))

    # return jsonify(errno=RET.OK, errmsg="退出成功")
